package com.example.gateway.filters;

import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.core.annotation.Order;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.stereotype.Component;
import org.springframework.util.MultiValueMap;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

@Component
// @Order(-1)
public class AuthorizeFilter implements GlobalFilter, Ordered {
	@Override
	public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
		// 1. 获取请求参数
		ServerHttpRequest request = exchange.getRequest();
		MultiValueMap<String, String> params = request.getQueryParams();

		String authorization = params.getFirst("authorization");
		if("admin".equals(authorization))
		{
			return chain.filter(exchange);
		}

		// 拦截
		exchange.getResponse().setStatusCode(HttpStatus.UNAUTHORIZED);

		return exchange.getResponse().setComplete();
	}

	@Override
	public int getOrder() {
		return -1;
	}
}
